/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package User;

import MyClass.DBConnector;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author God
 */
public class Login extends HttpServlet {

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        String username = request.getParameter("id");
        String password = request.getParameter("password");
        try {
            Connection con = DBConnector.getConnection();
            Statement selectSt = con.createStatement();
            ResultSet rs = selectSt.executeQuery("SELECT * FROM UserList Where userid='" + username + "'");
            if (!rs.next()) {
                RequestDispatcher dispatcher = request.getRequestDispatcher("login.jsp?wrong=y");
                dispatcher.forward(request, response);
            } else {
                if (username.equals(rs.getString("userID")) && password.equals(rs.getString("password"))) {
                    HttpSession session = request.getSession();
                    session.setAttribute("user", username);
                    RequestDispatcher dispatcher = request.getRequestDispatcher("homepage.jsp");
                    dispatcher.forward(request, response);
                } else {
                    RequestDispatcher dispatcher = request.getRequestDispatcher("login.jsp?wrong=y");
                    dispatcher.forward(request, response);
                }
            }
        } catch (ClassNotFoundException ex) {
            out.println(ex.getMessage());
        } catch (SQLException ex) {
            out.println(ex.getMessage());
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
